com.unit16.z.math.OnToDoubleFunction Maven / Gradle / Ivy
package com.unit16.z.math;
import java.util.function.ToDoubleFunction;
import com.unit16.z.indexed.Indexed;
public final class OnToDoubleFunction
{
private final ToDoubleFunction td;
public OnToDoubleFunction(ToDoubleFunction td_) { td = td_; }
public final double[] from(Indexed idx)
{
final double[] r = new double[idx.size()];
into(idx, r);
return r;
}
public void into(Indexed idx, double[] dst)
{
final int n = idx.size();
for (int i = 0; i < n; i++) { dst[i] = td.applyAsDouble(idx.get(i)); }
}
public double min(Iterable src)
{
double m = Double.MAX_VALUE;
for (B b : src) { m = Math.min(m, td.applyAsDouble(b)); }
return m;
}
public double max(Iterable src)
{
double m = Double.MIN_VALUE;
for (B b : src) { m = Math.max(m, td.applyAsDouble(b)); }
return m;
}
}